doc: Update catalog documentation for attstattarget nullable
Fixup for 4f622503d6.
Branch------master
Details-------https://git.postgresql.org/pg/commitdiff/556799660fc4dc23e187994ae5ea622933ea720f
Modified Files--------------doc/src/sgml/catalogs.sgml | 24 ++++++++++++------------1 file changed, 12 insertions(+), 12 deletions(-)
